Fibonacci

package AdvancedLoops;

import java.util.Scanner;

public class P12_Fibonacci {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());

        int f0 = 1;
        int f1 = 1;
        int counter = 0;
        while (counter < n-1) {
            int nextF = f0 + f1;
            f0 = f1;
            f1 = nextF;
            counter++;
        }
        System.out.println(f1);
    }
}